Clamp



Jan. 9, 1923..

J. WATSON. CLAMP. FILED JULY 20. J92] I the following is aspecification.

Patented Jan. 3, i923.

"rates innate JOHN WATSON, OF NORTI'IPOBT, NEW YORK.

CLAMP.

. Application filed July 20, 1921.- Serial No. 486,232.

, To all whom it may concern:

Be it known that I, JoHNWVaTsoN, a citizen of the United States,residing at Northport, in the county of Suffolk and State of New York,have invented a certain new and of this specification and show anapproved form of the invention.

Figure 1 is a plan View showing the clamp in position on two boards tobe drawn together.

Figure 2 is a corresponding side elevation.

Figure 3 is a elevation showing the outer face of the jaw through whichthe pressure is applied. 3 v

Similar reference numerals indicate the same parts in all the figures.

In the drawings the object or work clamp is shown as two boards to bestrongly compressed as in forming a glued joint at 1 along theirabutting edges.

The jaw shown in Figure 3 has a flange 2 and lip 3 arranged at a rightangle to each other, the lip 3 is adapted to engage the vertical face oredge at one side of the work and carries a pointed screw 4 by which suchengagement is insured, and the flange 2 arranged to extend above thehorizontal marginal face of the work. Beneath the flange 2 is an arm 5pivotally connected thereto at 6., and the arm carries a vertical lug 7drilled and tapped to receive a screw 8, preferably with left-handedsquare threads, as shown.

On the outer end of the screw is a head 9 pierced transversely andreceiving a rod or handle bent at a right angle to form the two arms 10and 11, either of which may be disposed in the head 9, and both havingknobs 12 to prevent escape from the head.

On the inner end the screw carries a swiveled loop 13 to which isattached one end of a chain 14. i v j The jaw adapted to engage theopposite edge of the wor: is similar to the jaw described and has a lip15 presented parallel with the vertical face of such object,

such face, and a flange 17 extending above th upper face of the work andat a right 7 angle to the lip 15. On the under face of the flange 17 isa hook 18 adapted to engage in equipped with a pointed screw 16"engaging either of the links of the chain 14 presented thereto. Thusarranged and engaged, the two jaws may be drawn strongly toward eachother by turning the screw 8, the strain being transmitted through thechain 14, correspondingly compressing the boards shown or any otherobject held between the jaws.

The angles at the junctions of the lips and .their flanges arereinforced as at19 to maintain their form under the strains. Suchreinforcement is shown as an outward swell along'the line of junctionbut the desired result may be attained by other means.

On the outer face of the lip 3 is a hook 20 adapted to engage a link ofthe chainll presented thereto when the latter isdetached from theopposite jaw and passed'around an object of cylindrical or irregularform, thus adapting the tool for service with such objects whenrequired.

The pointed screws 4 and 16 in the jaws may be withdrawn and the planefaces of the lips 3 and 15 applied directly against the plane faces ofthe work; the pivot at 6 and the flexibility of the chain serving toallow the lips to adjust themselves automatically to such faces if thelatter be not exactly parallel.

The angular shape of the arms 10 and 11 of the rod or handle and itsfreedom of movement in the head 9 is important for the reason that whendisposed as shown by the dotted lines'in Figure 1 the short arm 10 ispresented to serve as a convenient crank handle for turningthe screw 8,and when disposed as shown in the full lines, the long arm 11 may bemanipulated to turn the screw when the. clamp is applied in a corner orother close quarters.

The clamp is adaptable for service in many situations in which the usualbarclamp cannot be applied.and with or withnot the jaw 15, 17 may beemployed in va- 2. A. jaw having a horizontally disposed flange and alip extending downwardly at a '15 right angle therefrom, a lug pivotallyconnected to said flange, a hook on the outer face of said 11p, a screwengaged in said lug, and a chain joined at one end to said screw andadapted to be attached by either 20 of its links to said hook andencircle an object to be compressed.

In testimony that I claim the invention above set forth I affix mysignature.

JOHN WATSON.

